... SEND Send; LIST L; But[0].InitButton(200,380,250 ,40 0,LIGHTGRAY,"Send"); But[1].InitButton (40 0,380 ,45 0 ,40 0,LIGHTGRAY,"Exit"); Box[0].InitTextBox(50,70 ,47 7,90,GREEN,LIGHTGREEN,"Open File"); Port.InitTextBox(50,270,250,290,GREEN,LIGHTGREEN,"Out ... KyTu_Hex[]={'0','1','2','3', '4' ,'5','6','7','8','9','A','B','C','D','E ','F','a','b','c','d','e','f'}; int Gtri_Dec[]={0,1,2,3 ,4, 5,6,7,8,9,10,11,12,13, 14, 15,10,11,12,13, 14, 15}; double Value1=0,Value2=0; ... file chon co thay doi { setfillstyle(SOLID_FILL,CYAN); bar(155,155, 245 ,210); strcpy(RequestFile,strtemp); strtemp+=strlen(strtemp) -4; if(!strcmp(strtemp,".prn"))//neu dung file prn { FILE *f; if...